How do you multiply 3hrs 40mins by 7?

To multiply 3 hours 40 minutes by 7, first convert the time into minutes: 3 hours is 180 minutes (3 x 60) and add the 40 minutes, totaling 220 minutes. Then, multiply 220 by 7 to get 1540 minutes. To convert this back to hours and minutes, divide 1540 by 60 to get 25 hours and 40 minutes. So, 3 hours 40 minutes multiplied by 7 equals 25 hours 40 minutes.